A 46-year-old woman with a history of ovarian endometriosis, who underwent an abdominal hysterectomy with double adnexectomy for endometriosis 45 days before coming for consultation, referred by her gynaecologist for presenting continuous pain in the right iliac and sacral region since the immediate postoperative period that improved with anti-inflammatory drugs and for a discrete renal ectasia being observed in an abdominal ultrasound scan. On examination, the patient presented pain and defence on deep palpation of the right lumbar fossa and pain on percussion and palpation of the left lumbar fossa, suggestive of retroperitoneal pathology.
Simultaneous intravenous urography (IVU) and computerised tomography (CT) were performed, showing a functioning right kidney with delayed uptake and elimination of contrast and effacement of the right psoas line. The CT scan showed a lobulated image with liquid content and apparent contrast extravasation, the ureter being included in this formation. With the diagnosis of urinoma due to ligation or section of the right ureter and after a preoperative study, ureterolysis and removal of the urinoma was carried out via the iliac route, with end-to-end anastomosis of the ureter after refreshing the edges and freeing both ends. The ureter was left with a double J catheter tutoring the ureter, which was removed one month after surgery. The patient's evolution was favourable with no postoperative complications. At the follow-up one year after the operation, good renal function was observed with a normal urinary tract in IVUS.

